About This Tool
Our PDF Lock / Unlock tool lets you secure your PDF documents with a password or remove protection from existing PDFs — all directly in your browser. No upload or registration needed!
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Frequently Asked Questions
Q: Can I add a password to my PDF?
A: Yes! Just upload your PDF and click "Add Password". You'll be able to download the secured file immediately.
Q: Can I unlock a password-protected PDF?
A: Yes! If you know the password, enter it and click "Remove Password".
Q: Does this work on mobile devices?
A: Yes! Fully responsive design supports desktops, tablets, and phones.
Q: Is this really free?
A: Yes! No cost, no registration, no ads.
Q: Is my data safe?
A: Yes! Everything is processed locally in your browser — nothing is uploaded anywhere.